Maxillary overdenture

A maxillary overdenture may be supported by implants. Even though there is no solid evidence to prove how many implants would be ideal to stabilise an overdenture , the most common number of implants used to stabilise a maxillary denture is 4. See the Cameo surface impression video from Dr. Frontal view of mandibular overdenture. Mandibular implant overdenture.

Patient’s treatment plan is placement of a removable maxillary overdenture that is supported by precision attachments with male components on the retained tooth roots and female components on the prosthesis.

The authors from Mayo Clinic recommend placement of dental implants in the maxilla for overdenture prostheses in order to guard against dramatic changes in prosthesis design should an implant fail to integrate. What are the ideal locations for installing the implants? Unlike traditional dentures, maxillary overdentures are shaped like a horseshoe.

This is a godsend for many patients, as the palate of the prosthesis can be eliminated (Figs. 2a, 2b). This affords better comfort, speech and taste. Of course, dentures look nicer than a mouth of gums and no teeth. The patient also experiences a much easier time talking and eating with overdentures.

How many implants are needed for a mandibular overdenture? The photos below follow a case study in which dental implants were placed and used to support dentures to replace all missing upper and lower teeth.

Potential reasons for implant failure have been well establishe but in individual cases it can be difficult to isolate a definitive causative factor or group of factors. The survival rate of implants supporting maxillary overdentures is less than implants supporting mandibular overdentures, and should be an important consideration when planning treatment. An overdenture may be more esthetic than a FP, especially in the maxillary arch when the soft tissues of the face need additional support as a consequence of bone loss. Hygiene procedures are also not compromised when additional facial support is gained with a labial flange of the overdenture compared with the situation with a FP. Anterio-posterior spread and implant inclination.

Biomechanically it is better to reach a large anterio-posterior spread. The distal implants may be tilted dorsally, parallel to the anterior maxillary sinus wall. In the latter case, angulated abutments provide an optimal prosthetic screw access. As a whole, this group performed significantly worse with higher failure rates than the contrasting ≥splinted implants. The mandibular (lower) jaw has a significantly less surface area compared to the maxillary (upper) jaw, hence retention of a lower prosthesis is much more reduced.

Consequently, mandibular overdentures are much more commonly prescribed than maxillary ones, where the palate often provides enough support for the plate. Based on differences in bone volume, density and other anatomic factors, preliminary evidence suggests that at least four, and in some cases as many as six implants are needed to retain an upper (maxillary) implant overdenture. The upper two-implant overdenture should not be considered a standard procedure at this time — more research is needed.

It is attached by specialized dental attachments that are secured in the roots or implants. Overdentures are often worn by edentulous patients, patients who have lost all of their teeth. When considering the use of dental implants in the maxillary arch to retain an overdenture , a great amount of consideration must be given to anatomy, physiology, biomechanics, and to the opposing dentition.

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Maxillary Small-Diameter Implant-Retained Overdentures. It is usually not difficult in casual meeting to detect a person who has artificially constructed teeth or completed dentures. Most studies on maxillary overdentures aim at describing the treatment outcome related to the implant survival and in part to the assessment of prosthetic maintenance and failure. The choice of the implant system itself, design characteristics of the overdenture , and retention devices may result in specific prosthetic complications.

If a maxillary implant-retaine tissue-supported overdenture is planne the maxilla is typically treated with three to four implants, along with a bar substructure for support and retention. However, many patients function well with unconnected implants using simpler retentive component designs (Figure and Figure 9). For patients with teeth and strong bone structure the bar joint overdentures are prescribed. On the other hand if you if severe bone loss in the jaws and your teeth are all gone then telescopic overdentures are the usual method to build some kind of support for the artificial teeth to stay in place.

Breakdown in tooth structure or a breakdown in their periodontal support immediately negates an overdenture concept. IF WE ARE TO SUCEE WE MUST CONTROL THE FACTORS THAT JEOPARADIZE SUCCESS.